ul {
    list-style-type: none; /* 去掉默认列表样式 */
    padding: 0;
    margin: 0;
}

li {
    /* width: 400px;
    height: 18px;
    
    align-items: center; */
    padding: 0px 0px 0px 20px;
    
    
}

a {
    display: flex;
    align-items: center; /* 使得内容（图标和文本）垂直居中 */
    width: 380px;
    height: 18px;
    line-height: 18px;
    text-decoration: none; /* 去掉下划线 */
    color: white;
    padding: 0px 2px;
    transition: background-color 0.3s; /* 添加背景色变化的过渡效果 */
    margin: 0;
    font: 11px;

}

a:hover {
    background-color: #BBDDFF;
    color: white; /* 鼠标悬浮时文字颜色变白 */
}

.sub-container {
    margin-left: 20px; /* 子级缩进 */
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease-out;
}

.sub-container.open {
    max-height: 500px; /* 子目录展开后的最大高度 */
}

.icon {
    width: 16px;
    height: 16px;
    margin-right: 10px; /* 图标与文字之间的间距 */
}

BODY,
HTML {
    padding: 0px;
    margin: 0px;
}

BODY {
    font-family: Verdana, Arial, Helvetica, sans-serif;
    font-size: 11px;
    background: #EEE;
    padding: 15px;
}

H1 {
    font-family: "微软雅黑";
    font-size: 20px;
    font-weight: normal;
}

H2 {
    font-family: "微软雅黑";
    font-size: 16px;
    font-weight: normal;
    margin: 0px 0px 10px 0px;
}

.example {
    float: left;
    margin: 15px;
    font-size: 10pt;
    font-family: '微软雅黑';
    color: #fff;
}

.demo {
    width: 400px;
    height: 625px;
    border-top: solid 1px #BBB;
    border-left: solid 1px #BBB;
    border-bottom: solid 1px #FFF;
    border-right: solid 1px #FFF;
    color: #fff;
    overflow: auto;
    border: 0px;
    padding: 5px;
}
